Video playback problem after update to 11.04

I recommend reporting this as a bug. First read https://help.ubuntu.com/community/ReportingBugs carefully, and search to see if your bug has already been reported (that page explains how to do that, as well as providing lots of other important and useful information). You should search the bugs affecting the packages for your video playing applications, as well as the bugs affecting gstreamer0.10, gst-plugins-bad0.10 (since that provides the binary package gstreamer0.10-gl), and compiz.

Then you can initiate your bug report by producing this problem and invoking ubuntu-bug with the PID of the running process for the application in which it is occurring. Make sure that your bug report is complete and self-contained--it should not be necessary for the Ubuntu developers to refer to this question in order to fully understand and appreciate your bug.

After you file the report, you can use the "Also affects distribution" link near the top of the bug page to add the other applications where it occurs (besides the one you reported it against with Apport). Ultimately, this will probably be found to affect a component of Ubuntu that all these applications use, but the bug can later be marked Invalid in some or all of the packages you mark it as affecting, if that is deemed appropriate.

In addition, after submitting the bug report, you should link this question and the bug together using the "Link existing bug" link near the top of this question page.

Thank you for your answer. I opened and linked a bug as proposed.

How specifically did you run ubuntu-bug, to report this bug? There doesn't seem to be any process status information included. And why did you decide to indicate that if affects gstreamer0.10, but none of the other related source packages?

Ups, I read the ReportingBugs doc and than followed the instructions given there ("ubuntu-bug totem"), answered questions and this way "gstreamer0.10" was proposed, which seemed ok because the effect exists in many video players.
It's my first bug-report here.
So I'll report it again the way you described, and mark the first bug as duplicte.

I recommend you still add gstreamer0.10 as an affected package (using the blue "Also affects distribution" link near the top of the bug page). It's possible that's a more proper package. (The reason for running ubuntu-bug with the PID rather than binary package name is in case there's information about the running process that might shed light on the nature of the problem--that doesn't mean the bug is actually more properly associated with totem than with gstreamer0.10.)

I also strongly suspect gst-plugins-bad0.10, as I believe that package contains the functionality for OpenGL rendering, which may be what's broken here.